DNA test on hair from Guthrie home yields no profile, but sample preserved for future use

Six months after 84-year-old Nancy Guthrie vanished from her Tucson home, investigators find themselves at a familiar crossroads of forensic science — where the absence of evidence is not the same as the absence of truth. A hair sample recovered from the scene yielded no DNA profile, yet authorities preserve it, knowing that what cannot be read today may speak clearly tomorrow. The case, which touches the family of 'Today' co-host Savannah Guthrie, reminds us that justice often moves not in sudden revelations but in the slow, patient accumulation of possibility.